.jumbotron {
  background-image: url("https://via.placeholder.com/1920");
  background-size: cover;
}
.navbar.border-bottom {
    border-bottom: 4px solid #3BB3EE !important
}
.jumbotron {
    position: relative;
}
.bg-primary {
    
    background-color: #3BB3EE !important;
}
.border-primary {
    
    border-color: #3BB3EE !important;
}
.bg-gray {
    
    background-color: #D0D0D0 !important;
}